Tool for repairing pneumatic tubing.



- PATENTED MAY 16 1905.

I. PAWASARAT;

TOOL FOR REPAIRING PNEUMATIC TUBING. APPLICATION FILED J Amp. 1905.

A TTORNE m9.

. Nirnn STATES Patented May 16, 1905.

EVVALD F. PAVVASARAT, OF SHEBOYGAN, \VISCONSIN.

TOOL FOFI REPAIRING PNEUMATIC TUBING.

SPECIFICATION forming part of Letters Patent No. 789,931, dated May 16,1905.

Application filed January 6,1905. Serial No. 239.891.

together with a small quantity of liquid ce-- ment; and it pertains moreespecially, first,

' to the device for holding the elastic strips taut or in an expandedcondition preparatory to being inserted in the puncture, and, second, tothe trough-shaped grooves formed upon the respective sides of a needleof the tool for the reception of the elastic strips and the liquidcement, whereby the strips are more readily inserted through theaperture and whereby the fluid cement with which the strips aresaturated can be forced through the aperture without being wiped off bycontact with the walls of the pneumatic tube through which they areinserted.

The construction of my invention is explained by reference to theaccompanying drawings, in which Figure 1 represents a longitudinalsection of the tool as shown in connection with a pneumatic tube in theaperture of. which the tool is inserted. Fig. 2 is a front view of thetool in connection with the pneumatic tube, showing the position of thedevice for holding the elastic strips in a taut position preparatory tobeing inserted in the tubing. Fig. 3 isa simi-v lar View to that shownin Fig. 2, showing the position of the device for holding the rubberstrips in its reverse position, the rubber strips being releasedtherefrom. Fig. 4 represents a transversesection of a pneumatic tubewith the rubber strips inserted. Fig. 5 is a detail showing an enlargedView of the needle of the tool, and Fig. 6 is a transverse section drawnon line w w of Fig. 5.

Like parts are identified by the same reference-letters throughout theseveral views.

A represents the needle by which the rubber strips are inserted in thepneumatic tube B through an aperture C. The needle A is provided at itsfront or pointed end with a longitudinal groove D for the reception ofthe folds of the elastic strips E. The elastic strips are usually madeup of ordinary elastic bands, such as are employed for holding papers,&c., and the several folds are usually employed for stopping thepuncture. Preparatory to inserting the rubber strips they are foldedcentrally in the groove or recess D and the free ends are drawn back andfolded around the retaining-bracket F within the grooveG. The elasticstrips may be folded a greater or less number of times, according to thedimensions of the puncture which is to be stopped, and the position ofthe bracket F is such as to retain the bands in an expanded or tautcondition while they are being inserted in the aperture. The bracket Fis permanently but loosely secured to the shank I of the tool upon thepivot J, and said bracket is lockedin line with the shank and handle ofthe tool when the rubber bands or strips are wound thereon, said bracketbeing held in place by engagement of the pin K in the aperture L of thebracket, as shown in Figs. 1 and 2. When the bracket is thus secured inplace upon the pin, the clastic bands will be retained in their tautposition until inserted in the tubing. This being done, the rear end Mof the bracket is raised slightly and disengaged from the pin, when saidbracket will be turned in the reverse position upon its pivotal supportJ from that shown in Figs. 1 and 2 to that shown in Fig. 3, whereby thefolded ends N of the rubber strips will be released from the recess G ofthe bracket, when the needle of the tool may be withdrawn from thepuncture, thus leaving the rubber in the position indicated in Fig. 4.The respective sides of the needle are provided with longitudinalgrooves or recesses O O for the reception of the elastic strips E,whereby when said strips are in place in the needle they come within theline described by the circumference thereof and the needle may be moreeasily inserted through the puncture and also whereby the liquid cementwith which the elastic bands have previously been coated Will adhere tosaid bands and be carried through the apertures and be less liable to'bewiped off by contact With the Walls of the pneumatic tube through Whichthe instrument is being inserted.

Having thus described my invention, What I claim as new, and desire tosecure by Letters Patent, isp 1. In a pneumatic repair-tool of the classdescribed, the combination of a needle provided in its front end With anaperture for the reception of strips of elastic material; a bracketprovided with a recess for the reception of the folded elastic strips tobe inserted, pivotdescribed, a needle provided With a longitudinalband-receiving recess at its front end and With tWo longitudinal groovesextending rear- Wardly toward the shank of the tool; abracket pivotallyconnected to the side of the shank provided with a recess for thereception of the elastic bands and With an aperture for the reception ofa bracket-retaining pin; a transverse bracket-retaining pin rigidlyaffixed to the side of the shank of said tool and adapted to engage inthe perforation in said bracketand hold said bracket in place againstthe recoil of the elastic bands connected therewith, all substantiallyas and for the purpose specified.

In testimony whereof I affix my signature in r the presence of twoWitnesses.

EWALD F. PAWASARAT. Witnesses:

LEOPOLD GUTscI-I, EDWARD RUPPELT.

